Power plans disappeared after Windows 10 Fall update (1709)

UPDATE: I went back to 1703.
See source: New power options in Windows 10

Listing power plans using powercfg shows only the Balanced one.

And that's the registry situation:

And the power schemes, which seems fine:

What happend here?

Answer

Answer copied from: Can't change powerplan settings in Windows 10 build v1709

The powersettings dialog itself has not been changed, but the upgrade removed all powerplan settings but the Balanced one, and it will remember the setting currently in use.

If you switch to the balanced one, your old one will be forgotten too.

In order to get them back, you need to create a new powerplan first, mark one of the 3 templates and give them a name. For example, if you want to use the default High Performance powerplan, you first have to create it before you can switch to it.

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